| /* $Xorg: lbxzlib.h,v 1.3 2000/08/18 04:05:45 coskrey Exp $ */ |
| /* |
| * Copyright 1993 Network Computing Devices |
| * |
| * Permission to use, copy, modify, distribute, and sell this software and its |
| * documentation for any purpose is hereby granted without fee, provided that |
| * the above copyright notice appear in all copies and that both that |
| * copyright notice and this permission notice appear in supporting |
| * documentation, and that the name of NCD. not be used in advertising or |
| * publicity pertaining to distribution of the software without specific, |
| * written prior permission. NCD. makes no representations about the |
| * suitability of this software for any purpose. It is provided "as is" |
| * without express or implied warranty. |
| * |
| * NCD. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL NCD. |
| * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION |
| * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
| * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| * |
| * Author: Dale Tonogai, Network Computing Devices |
| */ |
| |
| #ifndef _ZLIB_H_ |
| #define _ZLIB_H_ |
| |
| #define ZLIB_STRCOMP_OPT "XC-ZLIB" |
| #define ZLIB_STRCOMP_OPT_LEN 7 |
| |
| #define ZLIB_PACKET_HDRLEN 2 |
| #define ZLIB_MAX_DATALEN 0xfff |
| #define ZLIB_MAX_PLAIN 270 |
| #define ZLIB_MAX_OUTLEN (ZLIB_MAX_PLAIN << 1) |
| |
| #define ZLIB_COMPRESS_FLAG 0x80 |
| #define ZLIB_DATALEN_MASK 0x0f |
| |
| #define ZLIB_PUT_PKTHDR(p, len, compflag) \ |
| { \ |
| (p)[0] = ((unsigned)(len)) >> 8 | ((compflag) ? ZLIB_COMPRESS_FLAG : 0);\ |
| (p)[1] = (len) & 0xff; \ |
| } |
| |
| #define ZLIB_GET_DATALEN(p) \ |
| ((((unsigned)((p)[0] & ZLIB_DATALEN_MASK)) << 8) | (unsigned)(p)[1]) |
| |
| #define ZLIB_COMPRESSED(p) ((p)[0] & ZLIB_COMPRESS_FLAG) |
| |
| struct ZlibInfo; |
| |
| extern void * ZlibInit ( int fd, int level ); |
| extern void ZlibFree ( struct ZlibInfo *comp ); |
| extern int ZlibFlush ( int fd ); |
| extern int ZlibStuffInput ( int fd, unsigned char *buffer, int buflen ); |
| extern void ZlibCompressOn ( int fd ); |
| extern void ZlibCompressOff ( int fd ); |
| extern int ZlibWrite ( int fd, unsigned char *buffer, int buflen ); |
| extern int ZlibWriteV ( int fd, struct iovec *iov, int iovcnt ); |
| extern int ZlibRead ( int fd, unsigned char *buffer, int buflen ); |
| extern int ZlibInputAvail ( int fd ); |
| |
| |
| #endif /* _ZLIB_H_ */ |